Improvement in hollow augers



LTNITED STATES PATENT OFFICE.

EDWARD W. FAWCETT, EMMOR W'. SILVER, AND JOHN DEMING, OF SALEM, ,OHIO, ASSIGNORS` TO ALBERT R. SILVER AND JOHN DEMING, OF SAME PLAGE.

Specification forming part of Letters Patent No. 143,132, dated September 23, 1873; application filed July 28, 1873.

the following is a specification:

The nature of our invention relates to an improvement in hollow angers; and it consists in, irst, a beveled or iianged 'rim for adjusting the cutters and blanks, so as to regulate the size of the opening in the cylinder; second, the beveled ends of the cutters and blanks, correspondin g to the bevel on the rim, so that by turning the rim against them they will be moved inward, so as to contract the size of the opening, each one maintaining the same relative position; third, a jam-nut, with left hand thread to tighten against the ilanged rim, so as to hold it in position; fourth, an adjustable shank, with a screwhead upon its inner end working in the cylinder, and a finer thread upon its stem, both threads running in the same direction, upon which a jam-nut works, so as to hold and center the shank; iifth, a jam-nut, having a concave recess upon its upper side, so as to receive the end of the cylinder and center the shank in position; and, sixth, in the arrangement and combination of parts, which will be more fully set forth hereafter.

The accompanying drawings represent our invention.

c represents the cylinder, internally screwthreaded its entire length, and having any desired number of recesses l formed in its front end, so as to receive the cutters and blanks 2, and in between each recess a projection, 3, which serves to center the annulus or ring 4, which binds the cutters and blanks to the cylinder, allowing them to be moved in and out at will. Around the top of the cylinder is formed a right-hand screw-thread, upon which works the rim c, having lts inner surface beveled, so as to form an incllned plane, which Iwill correspond to the bevel ou the outer ends ofthe cutters and blanks. By loosening the ring 4, and then screwing the rim upward, this inclined plane, acting on the beveled ends of the cutters and blanks, moves them inward over the opening in the end of the cylinder to regulate its size. By tightening the ring, they will then be secured in the desired position, ready to form tenons upon the ends of spokes and other articles. Just below the thread on which the beveled rim moves is formed another thread, smaller, and running to the left, upon which works a jamnut, e, which screws up against the bottom of the beveled rim, and holds it in position, the ends of the cutters and blanks preventing it from moving upward, and the nut from moving downward. Working in the screw thread on the interior ofthe cylinder is the shank 5, having a head formed upon its front end, which regulates the length the tenon is to be cut. 'lhe stem of the shank is also threaded, the thread being ner, and running in the same direction as the one Ourthe head, and upon which the jam-nut 6 moves. nut has a recess formed in its top, which extends over the end of the cylinder, and centers the stem firmly in position.

Having thus described our invention, what' finer than the thread on the head, in combi Y nation with the jam-nut 6 and cylinder a, substantially as set forth.

This

5. In a hollow auger, the jam-nut 6, hav-l our invention we hereunto aftix our signatures ing a recess formed in its topfor receiving this 22d day of July, 1873.

the cylinder a, substantially as set forth, con- EDWARD W. FAWGETT. structed and operating to hold the stem 5 in EMMOR W. SILVER. a central position. JOHN DEMING.

\ 6. The combination of the rim, cutting devices having beveled ends, cylinder, shank, Witnesses:

and jam-nuts e 6, substantially as set forth. SAMUEL LEWIS,

In testimony that We claim the foregoing as R. H. GARRIGUES. 

